dewar

plural dewars · alternative Dewar

1. A vacuum flask; a vessel which keeps its contents hotter or cooler than their environment without the need to modify the pressure, by interposing an evacuated region to provide thermal insulation between the contents and the environment.

   A large thermos-like container called a dewar contained 645 gallons of liquid helium to be cooled to within two degrees of absolute zero.

   2009 February 17, Guy Gugliotta, “Perseverance Is Paying Off for a Test of Relativity in Space”, in New York Times

   Synonyms: Dewar bulb, Dewar flask, Dewar tube, Dewar vessel, vacuum flask, vacuum thermos, vacuum thermos bottle, vacuum thermos bulb

plural Dewars

1. countableuncountableA surname from Scottish Gaelic.
2. countableuncountableAn unincorporated community in Black Hawk County, Iowa, United States.
3. countableuncountableA city in Okmulgee County, Oklahoma, United States.

plural Dewars · alternative dewar

1. A glass or metal double-walled flask for holding a liquid without much loss or gain of heat; a vacuum bottle or thermos. Generally used for scientific purposes and in particular for cryogenic work.

   Synonyms: Dewar bottle, Dewar bulb, Dewar flask, Dewar vessel